work on Brezenhem algorithm
Add ScrollPane
add coordinates. center coordinates is the center of Desktop
fix Brezenhem's algorithm

fix segment's width and height calculation
make correcton to Desktop's center in mouse listeners
Add Brezenhem's segment algorithm to UI
rename edge to segment
Reorganize EMenuItem to work with tool panel
Clean ups with eclipse
Fix bug with windows minimising after init Desktop
Reorganize segment's classes

Move similar segment's methods to base class.
Delete Segment from UI
Code cleanups
Work on Vy algorithm
Add Vy algorithm
Improve Vy's algorithm
Clean ups
Add scale
Fix Wu's line algorithm

Add field color to Point's class
Save point's color while generate